Skiving-machine.



F. L. HARMON.

SKIVING MACHINE.

Q APPLICATION FILED MAR. 9. 19H. 1,161,860. Patented Nov. 30, 1915.

2 SHEETS-SH T I.

W/ZWfSSESL F. L. HARMON.

SKIVING MACHINE.

, APPLICATION FILED MAR. 9. I9II- 1,161,860. Patented Nov. 30, 1915.

2 SHEETS-SHEET 2- and shoulder. Hitherto the angle of the skive has beenvaried by. adjustingsome part of the machine, for example the knife,

UNITED STATES PATENT oEEIoE.

FRANK L. HARMON, 0 BEVEEIQYQMAssAoEUsET'rs, AssIeNoE 'ro UNITED SHOEMACHINERY COMPANY, or rA'rEasolv, NEW JERSEY, A CORPORATION or NEWJERSEY.

drawings indicating like parts in the several figures.

This invention relates to skiving machines a and. is herein shown asembodied in a machine of the type disclosed in United States Patent No.726,285wl1ich was-granted to me on April 28, 1903. I

In practice it is required, in order to meet various conditions, thatmeans be provided for varying the width, angle and character of theskive produced on the stock, these skives being commonly known'asstraight while the change from a straight to a shoulder skive or viceversa has necessitated the replacement of the feed roll by another rollof the propercontoun, Inthe present invention such adjustments andreplacements are done away with by providing,

v; with a feed roll which is yieldable bodily and angularly, a pluralityof interchangeable presser feet the working faces of which are formed toproduce the various types of skives. These presser feet are adapted tobe readily attached and detached, and are care- I fully fitted andadjusted to the machine in thes'hop' where the machines are{manufactured so that thereafter when said machines v are in use noskill on the part of the operator is required tochange from one type ofskive to another;

Another object of this invention consists in the provision with acombined stock supporting and roll supporting member, of

means for producing relative movementibetween the knife and said memberand preferably the edge gage and presser foot are also mounted upon thismember. In the illustrated embodiment the supporting member is madeadjustable so that whenthe knife becomes worn the single adjustment ofthis member brings the roll and knife intosproper relative position,withoutv necesclaims. g Referring to the accompanyingdrawings, Figure 1is a side elevation;'F1g. 21s a sec;

table, Fig? SKIVING-MACI-IINE.

sitating any adjustment of the edge gage or presser foot. i It isdesirable that the forward portion of theedge gage be maintained incloseproximity to the knife edge. Whena knifehavmg a circular outline isused, however, lateral adjustment of the edge gage increases the spacebetween said gage and said quired to bring said gage up to proper posi-;tion.

Inorder to overcome this disadvantage a furtherobjectof this inventionconsists in knife so that a second adjustment is re the provisionwithaknife having a circular..-

outline of an edge gage which when adjusted is compelled to move in acurved path 'corresp ondingto the curve of. the knife edge. With thisconstruction the distance between the edge gageiand the knife edgeremains the same whatever the lateral position of saidgage. v i Inmachineswherein'the contour of the presser foot or its angularadjustmentdetermines the contour of the skive it sometimeshappens that the stockbuckles between thepresser foot and the knifeandfis notproperly smoothedout. Or it may be that although no buckling occurs the stock is not fedwith the desired speed.

Accordingly another object ofthis inventionconsistsin the provision 'ofa spring pressed auxiliary roll to cooperate with the 1 feed froll andvpreferably this auxiliary roll is positively driven, ard the tension ofthe spring which presses it against the stock maybe varied. VVith thisconstruction the rate of feed may be controlled and the leather smoothedout as it is fed to the knife.

These and other features of the invention including certain details ofconstruction and combinations of parts will be explained, in

connection with thefollowing' description of a machine. and will bepointed out inthe tion on the line 2-2 of Fig. 3; Fig. '3 is a sectionon line 33 of Fig. 2; 4 is a. perspective. of the feeding and cuttingmech-' anism taken from above the supporting table ,Fig. 5 is. aperspective of the feed roll and its mounting taken I from below said 6is a perspective of a presser use the operator in order to produceaskive of the angle or character desired has only to select the properpresser foot and lock said foot in place by means of the handle 75.

In Fig. 6 another presser foot 195 is shown, said foot being detachedfrom the machine; and it should be noted that the working face 197difiers from that of the foot 72. This presser foot is providedwith aset screw 199 which has been properly adjusted so that the foot is readyto be clamped in place when desired. j r

In machines of this class it is usual to provide an edge gageto guidethe edge of the stock as it is being skived, andcommonly these gages aremade adjustable; in astraight line. In the presentinvention, however,the

edge gage is so mounted that as itis adjusted itmoves in a curved path,its forward end thus following the contour of the edge of the knife. Theconstruction by which .this is accomplished in the illustratedembodiment is as follows :Slidably mounted upon the yoke 43 is a member87 having a straight slot 89; and pivoted at 92 upon said member is asecond member 91 having a curved slot 93. In order to hold said membersin adjusted positiona' clampingmember 95 is provided, said member beingenga'ged by a thumb-screw 97. The edge-gage 99. is

shown as'formed integral with the-member 91. The shank of thethumb-screw97 passes through a bore in the yoke 413 its axis being thus stationarywith respect to the gage; and the pivot 92 holds the members 91 and 87so that they are compelled to move together when one is adjusted. Itwill now be clear that, when the thumb-screw 97, qis loosened and themember 87 moved longitudinally, the member 91' because of its curvedslot 93 and: its pivotal connection 92 will be moved in a curved pathand will, carry with it the edge gage 99. The form of this edge gage isbest shown in Fig. wherein it-will be seen that the end of said gage iscut away to fit the presser foot/1'2 and that the innermost portion of,said gage extends beneath said foot in close proximity to the edge ofthe knife. With this construction and mounting of the gageit will beclear that in all its positions its end is automatically kept close tothe edge of the knife. s

Turning now to the mechanism for driving the feed roll the drivingsleeve a9 is supported in a block 101 fastened by screws, not shown, tothe'table 15, and said sleeve is held from longitudinal movement withrespect to said block by means of a yoke 105 fitting; in a groove insaid sleeve and held fast to saidblock by a screw107. This sleeve 4:9.is formed at one end with a gear 111, and this gear meshes with an idlegear v 113 which rotates upon a stud 115 carried by the frame. Meshingwith the idler ll3'is as shown.

counter shaftis driven from the worm 5 by means of a gear 123 The gears111 and 113 are. so arranged that when the table 15 is adjusted the gear111 may roll on the gear a second idler 117 also carried by the frame,said second idler being driven from a gear 119 fast upon a counter-shaft121; and this 118, no adjustment of any of the gears between the worm 5and the feed roll being necessary.v i l 1 Q The knife 125-, ofthe rotarytype, is pro- "ided with a circular opening at its center .which fitsover a cylindrical extension of the enlarged upper end of the shaft 3and is clamped to said enlargement bya screw 127; and in order toinsure'that said knife shall beheld from turning with respect to saidshaft, apin 129 fixed in the enlarged end of said shaft extends upthrough a suit able hole insaid knife. The knife shaft rotates at a highspeed, and in order to provide continuous and eflicient lubrication apocket 133 isformed in the upper part of the frame, and said pocket ispacked withan absorbent material 185such as felt. Access to"thispocketispermitted by a shallow channel which is out in the uppersurfaceable means. t

In order to fe d rapidly and uniformly to the machine an auxiliaryvfeeding mechanism is provided. Fast to 3 the sleeve 19 which drives thefeed roll is a roll 137, and ooiiperating insurethat the' 'work shall beI with said roll 137 is" an auxiliary roll 139.:

This auxiliary rolllis carried by a flexible shaft 141. One end of thisshaft is journaled in a block 143 which is fast to the table 15 whilethe other end is journaled in a block-14:5 which is shown asintegral-with a spring arm 1 17. In order that the. tensionf 'of thisspring arm may be varied said arm rests upon a wedge shaped piece 149, a

vscrew 151 passing through said arm and piece and holding them fast tothe block 1 18 A thumb-screw 153 also passes through these members andinto the block,

said screw being located near the thinner 12o end of the wedgeshapedpiece 149. A set. screw 155, provided witha lock nut 157, is

threaded through saidspring arm and abuts Y the upper surface of theblock 1418. lVith this construction and arrangement of parts the tensionof the spring arm may bevaried by turning the thumb-screw 153, and byadjusting the set screw 155 the position of the roll 139 and hence thedistance between that roll and the roll. 137, maybe varied. The.

said carrier being cut away between said bearings to provide space forthe pulley 165 fast on the grinder shaft. 1 lower bearings of thecarrier are connected The upper and by a member 167 which is hollow toprovide an oil reservoir, a cap 169-cl'osing the upper shaft 171 whichis rotatable in bearings in 1 the frame.

end thereof. This carrier 163 is fast to a Fast to the opposite-end ofthis shaft is an arm'l73, and threaded through this arm is an adjustingscrew 175-, said screw being mounted in a lug 17 7 extendinghorizontally from anflupright boss 179, a pair of collars on said screwholding it fro-m longitudinal movement. The bearings for the grindershaft are provided with oil wells packed withfeltsimil'a-r to thatprovided for fthe knife shaft. The "oil hole for the upper bearingisjclose'd bya knurledring181, while that-for the 'lowerbearing', as hasbeen stated is closed by the cap 169.- It should be noted that thepulley 165 of the grinder shaftfis solocated that itiis driven from-th'e belt 11 V which also drives the knife and the feeding mechanism.In order to remove any bur which may be formed on the under side of theknife" edge "an auxiliary stationary grinder 183 is carried by thetable. 7

' table;

The flexible shaft 14 1is driven fromthe shaft 121 by meansoffpulleys'185 and 187 and a belt 189. In brder to keep said belt I; I40

tight a tightener p'ulley'191 is mounted on a stud which "is carried'byan adjustable bracket fastened to the under side of the Withthisconstructionthe belt 189 may always be kept tightened whatever maybethe adjusted position of the table.

In operation the stock is placed on the supporting table and fed to therolls. 'The rigid presser foot forces the feed roll to yield bodily andangularly so that the stock is presented to the knife in a mannerdependent upon the contour of the working face of said presser foot. Thestock passes over, the knife while the skivings pass beneath the knifeand are directed away from theworking parts by the chute 131. When it isdesired'to change the character of the skiye the presser' foot isreplaced by one liaVing a working faceof proper contour.

Although the IIIVGHtlC-Il has been set forth I inrconnection with aparticular machine it should "be understood that nothing hereincontaine'dis to be construed as limiting the invention in the scopeofits application to the particular machine shown and described. 'Havingthus described the invention what igieaseo Iclaim and desiie to secureby Letters Patentis:-'

'1. machine of'the class described having, in combination, a shaft, aknife fixed to the upper end thereof, means for rotating said shaft, afeed roll, and a'train of gears connecting said roll and shaftwhereby-said roll is driven fromsaid shaft, said train comprising a"gear held to rotate with said roll and an adjacent gear, said gearsbeing placed one above'the other whereby the feed roll may behorizontally adjusted while maintaining the'mesh of said gears. V

2.. A machine of the class described having, incombinat-io-n', a shaft,a knife mounted said shaft and roll, means for yieldingly supportingsaid roll against movement toward "and from said knife and I againstangular movement with respect to sa1d knife, and

' a rigidly held presser foot whereby thecontour of the a'cting'face ofsaidfoot determines the character of the skive produced.

- 3; A machine of the class described hav-' ing, in'combination, aknife, a feed roll, a supporting member carrying sa1d roll, sa1d member-being adjustable toward and from saldknife, means forjactuati-ng sa1dknife and roll',*said roll being yieldingly mounted 1 to accommodatedifferent thicknesses of stock and different angles of bevel, and arigidly held presser foot.

- 4}. A machine of the class described having, in combination, a shaft,a knife mounted upon the upper end thereof, means for actuatingsaidshaft, a pivoted supporting block, a yielding member acting to rotatesaid block about its pivot, a yoke pivotally mounted in said block, ayielding member acting to rotate said yoke about its pivot, a feed rollmounted in said yoke, means includinga universal joint for actuatingsaid roll, and a rigid presser foot.

5. A machine of theclass described having, in combination, a knife,means for 'actuating said knife, a feed roll, a longitudinal-lyadjustable member carrying said roll, said roll being bodily movableabout an axis approximately parallel to its own and being also angularlymovable about an axis at right angles to its own; said last named axisintersecting said roll at approximately its uppermost, innermost point,a rigidly held prlelsser foot, and means for actuating said r0 6. Amachine of the class described having, in combination, a -knife having acircular outline, a feed roll, means for actuating said knife and roll,a presser foot, an adjustable edge gage, and means connected with saidgage for automatically compelling the adjustment of'said gage to takeplace in a curved path corresponding to the curve of the knife edge.

7. A machine of the class described having, in combination, a knife, afeed roll, means for actuating said knife and roll, a presser foot, alongitudinally adjustable member having a Straight slot, a secondadjustable member having a curved slot, a pivot connecting said members,a pin extending through both slots, said pin being held from movement inthe direction of adj ustment of said members, and an edge gage carriedby said second adjustable member.

8. A machine of the class described having, in combination, a knife, ayielding feed roll, an unyielding auxiliary roll coaxial with said feedroll, means for actuating said rolls and a spring pressed rollcooperating with said unyielding roll.

9. A machine of the class described having, in combination, a knife, ayielding feed roll, an unyielding auxiliary roll coaxial with said feedroll, means for actuating said rolls, a spring pressed roll cooperatingwith said unyielding roll and means for varying the pressure exerted bysaid spring-pressed roll.

10. A machine of the class described havof the knife, a feed roll and anauxiliary roll carried by said table, and means for actuat ing saidrolls.

Copies of this patent maybe obtained for 11. A machineof the classdescribed havmg, in comblnation, a knife, a feed roll, a pa1r ofcooperating auxiliary rolls situated at one end of said feed roll, oneof said auxt mounted on the upper end of said shaft,

means for actuatlng said knife, a supporting,

member, a carrier supported thereby, said carrier being mounted to yieldbodily and angularly, a feed roll mounted in said carrler, an edge gagemounted on said carrier,

a rigid presser foot, and means for actuating said roll. I

13. A machine of the class described having, in combination, a rotaryshaft, a knife fixed to theupper end thereof, a feed roll arranged toact upon the under side of the stock, means for actuating said roll fromsaid knife shaft, and an auxiliary spring pressed roll arranged to actupon the upper 1 side of the stock. V

In testimony whereof I have signed my name'to this specificationin thepresence of two subscribing witnesses.

FRANK L. HARMON'. Witnesses:

HERBERT W. KENWAY, ARTHUR L. RUSSELL.

five cents each, by addressing the Commissioner of Patents, Washington,D. 6.

